Stone-Walled Sanctuary in Alpine, New Jersey 07620

You wouldn't guess from its fairy-tale-worthy stone exterior, but this estate has been unable to attract a buyer for years, during which time it has been repeatedly put on and off the market without changing ownership. Currently on sale for $39,900,000, the millionaire-ready manse was built on the estate of Henry Clay Frick II, the grandson of renowned steel tycoon Henry Clay Frick. Buyers willing to splurge on the modern-day palace will find that the 30,000-square-foot interior is rife with amenities, including a home theater, wine cellar, and an 11-car garage.